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All results from a given calculation for HNCO (Isocyanic acid)

using model chemistry: mPW1PW91/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at mPW1PW91/6-31G
 hartrees
Energy at 0K-168.564044
Energy at 298.15K-168.564877
Nuclear repulsion energy58.659210
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at mPW1PW91/6-31G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3890 3682 296.02      
2 A' 2377 2250 557.51      
3 A' 1323 1253 11.47      
4 A' 572 542 16.06      
5 A' 497 471 337.74      
6 A" 572 541 0.18      

Unscaled Zero Point Vibrational Energy (zpe) 4615.2 cm-1
Scaled (by 0.9466) Zero Point Vibrational Energy (zpe) 4368.7 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at mPW1PW91/6-31G
ABC
61.01717 0.35754 0.35546

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.478 -1.432 0.000
N2 0.579 -1.005 0.000
C3 0.000 0.048 0.000
O4 -0.691 1.023 0.000

Atom - Atom Distances (Å)
  H1 N2 C3 O4
H10.99532.09143.2760
N20.99531.20172.3932
C32.09141.20171.1954
O43.27602.39321.1954

picture of Isocyanic acid state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 N2 C3 144.161 N2 C3 O4 173.464
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.382      
2 N -0.539      
3 C 0.539      
4 O -0.382      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.612 -1.510 0.000 3.017
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -13.597 -1.096 0.000
y -1.096 -18.062 0.000
z 0.000 0.000 -16.413
Traceless
 xyz
x 3.641 -1.096 0.000
y -1.096 -3.057 0.000
z 0.000 0.000 -0.584
Polar
3z2-r2-1.168
x2-y24.465
xy-1.096
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.118 -1.555 0.000
y -1.555 3.629 0.000
z 0.000 0.000 1.036


<r2> (average value of r2) Å2
<r2> 35.872
(<r2>)1/2 5.989